Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '059303da987ed2cee900d24c78c809b6ddf13bf3c218f63a737968a5911c0241' 
  AND token = 'oKdbA4NdeNnsCcRM2U1boY903zGbWLXPHRKXbdkDTug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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