Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97a200fe4340602153b5557e9e10c39cf4e3bfc6a360156dd67b2a00c70e6374' 
  AND token = 'azYvRnS5j9cYA/FuWII8x5Oor2yHVpxLv3pp69Bp4UQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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