Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e6b5405c486b87e368fac2808f5f1fddc3ac9d32e7b078d8a630d0259a6d815' 
  AND token = 'sJItle2+1cjflBvMDCqKPX3CvhnDbEdr4WY6GHIWGoE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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