Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0f15e017c22e817226f5d63653d33197ab4a308b7a9f3c75aecce8bd638f7dd' 
  AND token = 'fGFhhCdN/O1/M4k9fcO5K1jdwrkF6ppFSKNvc8NfT8A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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