Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ec17725e19692d22617fec70e4e0f210a96a58c3672aba98342c6b8a5ebb041' 
  AND token = 'sAXRbnpLjFbjLNGUMriFkl+pBMUAMqFkrJ1/f7GyN2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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