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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64e48c890e25c4104f42839f8824015f69328d46a77ad45af20d805a3416d066' 
  AND token = 'RlEz5GbZZDH5n96LxcOKWpJpap7KsQowiWl5Qus9W/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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