Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88e11a7fd60e882b200fc4e1d5c2aa39fb9601c329c6daffc1f00e8f9c83d603' 
  AND token = 'wie1IDGDtk66z/2Vi3Lb7Kn+bJhI/hGQ/6itPyDNx+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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