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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '260fcb247bdec3fc9c9d48c16af14d19c2c2250eff5a6acaadba3b1d87208e5e' 
  AND token = 'Z6XEm4U5E20lNfaEKE5DvkV7dEGYHcq4xBQb1xKX+/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}