Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '500aaffd37dc35cb6737ede4a859baeafa64cc9b08e2d4b306730dc3cc14b8be' 
  AND token = 'uH/014cv2l2XedSw9m9m6SDU/NDvfecdOWpottiE4Ps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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