Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee4c267f9d2b73a369ad2aa77e5719fce19e6f551b9be5b9a6852e7edf2eb7d9' 
  AND token = 'yxAOAZe5NjjnugnE5Oh5VOkND8ok72PGqZBjJdx3DMI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}