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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07f313d89e809659d89815b2497304fd41da9664384ba3a872de139a029b83ba' 
  AND token = 'GIjMtCN12MkDAMCNpFHu0eeEwqGqjr0P4pAOlsy3hxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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