Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c657b5a8f31d8b7abd889a88f30237298fc8f266a8c481fd24e9efd57f496611' 
  AND token = 'anZy3e5U0Gu7vpOrwD3LBcNOp6CNe6dBG6IkbHjMW08=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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