Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '577515649fb50e83435a7c39f964716866242624f6e2c87aa617c2ac8d1963d9' 
  AND token = '9wgyv7pjSFRakVi0SV5OlkIflVyi5HSYH5NiaWIVtzM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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