Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da0ee940264e4d84849a4d4cc8b8d43e9bddc88e9a0cb23c6759e361dee33878' 
  AND token = '7R/XSTO/GcaB8z7Z3ajcrsQEZK2yqSkzeTB97w8f4NY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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