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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '053a705dec578e8890dc988712fbfb083ebe98a82eb3d3f43a11837252dd3a09' 
  AND token = 'SjsQdoCkDkyoK8FvxwHPS4P+KU5lnpB/F/xD+sD8MlA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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