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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f07182d31cb20759b70b455bc1081e5bc62bddb26182100a4254febc8a5419b' 
  AND token = 'MHkvbZ6/PSEJEU5127RKRJXHtw4iJza0tX60RbrkBMM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}