Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f4e308fe158aa5ca837f6bd361e3c47c49f76f479c2cce54147c947aeb10a82' 
  AND token = 'ySVGPmOBKCotOmOuhmloclMsJPJH4bO7bLx8Nexxmfg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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