Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '791f430204c99bbea9007a97f4d872a0de4758a1399e2f2355693abef854df75' 
  AND token = 'XjHERZ5RwJbCvD3CvmBWW97ig9hCVdW2sC6RWkUiLw4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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