Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2211954590e1876e9de1566f5b50443777e1dd9fb0e894f6b78f17e454794f9' 
  AND token = 'oXrwmgbvNMP/VL1q8/ZlkDJ4MwTL6b9HRJKA7A9sg9w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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