Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f027cbb8b0117a47106c57f3c40bd9e9c2a919b6bec2339ca7ccd079ca28051' 
  AND token = '11U0ACt0uFzEjaCoBRb7DbuYtA+o2ic+pf/SMxbm5ug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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