SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa817172b79687f588d23d909682b384f3460dfb9d2cce2c143b41b4985802e2' 
  AND token = '1w+zcsKvPi/g+zP/vnl+260nUYNYRxu3Ru5QX7EY32o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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