Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b76a572eca6e2c6e2ae26bc899dbd8356c749867ebf297428282204e439f1b5f' 
  AND token = 'pxlcPn/z89n8q6XIv2jNmsvjz4B7W4voRPJB1vddAAQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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