Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78f52e0c2f36de0f196746410d57a3c44b1dac54b074381d98d40e7be2818e11' 
  AND token = 'm3FRqOKrdgtrcwekBSVRQhzjFLoy9qjMFxODiCvdd4c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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