SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06e25256f70b2b4d48ed1fc80bbb4bb2b5769c5357386f16b9eaa110e51c3dd7' 
  AND token = 'GpIfWULxBgzBhuzW253Hd65T13ZCayJjJgOo0ZqWnF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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