SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9322746fd4aa9542a5d5bf5234383a90a85654cefcbf7790934ef277b79051cb' 
  AND token = '+09AYVuOn7bfhhkvmHtuVZv6LWtYNdoqxc0fiCJ8rdk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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