Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2460bb005efa5904492093937b4858b8fbe07687b2c952433a14c8fd76f035df' 
  AND token = 'McsKUATjIEhsTzZgX1cidOrYxdRpH4pKUjFTGV433Ns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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