Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e47ccab53e9a0609da63cb313c84292de32b0bb269d13e8e99e9d7ddbecfbb54' 
  AND token = 't5GZvwGpgG0TBCCyAn7u3UB05Q2MKpH37Dn/PUzQmcU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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