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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1cd9ce852e5ab0baf7ce48dc079c745370760bdde7a6655f1d742f43c8ecd488' 
  AND token = 'A1gatVxIoT0qJe+gMZKOWxBWihOXRPS80vwsxAJvW6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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