Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '411f63dce0f017e17d52d9317eed874a172016bea52750b66f674ef33bb5df07' 
  AND token = 'WOmvSzzFOsaB4MxVAcApTuWO/ixyquHGH1BHcxyDaZk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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