Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18780e90c38f30feec8798f1a4cb3dd7c2936495476350e358016a3a58029bda' 
  AND token = 'gbHwyi8Y0d1bErg3LjoqZwiq0seGSHtpMSzA6voITb4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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