SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09889618f5157a24355637e689b51d07ee46344a97a20ff248e96c63fa34fe60' 
  AND token = 'dnz3oPGI+35/F/nHKy9KifBjaPszJo+fs9HzIzvkZU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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