Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '99d7f755448d610d7f45c4d849ea811896b4643db9ee6e624a6cd271ce094459' 
  AND token = 'qjkRTAWWj7RgSdsCzudUt1bRNZ/Lh2j4FrZklrbn/BM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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