Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f27e7ea2b88e622863150bd7658b9280d42816abe107bccba80a1917eb64bb48' 
  AND token = 'pODpLOrjFkspFPynEMqP2q2YWxfMFC7L7/+u3btrDB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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