Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4ab229787f16dc7486bbda1da8f914f90e9c32c8ad59e6279602f6b31447307' 
  AND token = '4fq1HuirBDngzplI0U2JoTNff0J/8t/GLXu/lXZHupk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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