Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4d71ed0e458fad3b10c08a4064df587f068d56a4140f99feadbca063cd2d0f5c' 
  AND token = 'sQVxTNyMrumv40BnDCtO6kC2C0mI320xqx5yASITh7k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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