Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2426c2d71cee86fd200d754f71b717adcab68fbddc292993c3917ac03ea2e82d' 
  AND token = 'DYHFli8Ac3qUXc+qbs4PVZ39Yuko5aKkRsYVL4Xl34U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}