Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c914633db35bd3275760f072f203478265a1b0bf4ec93cca905ac9199ea11ca0' 
  AND token = 'wiFrNkVU0kFlixPnMM2TiLtt++NCBMvVrVDC0vlPBUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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