Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5fbee495b7a956f281c11309559471c2e0766f7dca70b098b978d78bf769e9ef' 
  AND token = 'H57RcvcbokS6UDKD35d4cw9eeEri2wccuUuZ/JpxUl8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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