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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7dc5222981904c68fa53ecd4df3a01608e9f411d593ce4a13851241041e2dfbd' 
  AND token = 'JKFj+m0s4YLZJx4cnyNR6dbmZNkS0l1yKQ9P3v0R88Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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