Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8681183f1be227d2bfcb6dce674387b32f011ea507c94ba3b25d619cae505f1' 
  AND token = '/YfMbo2tlx5v0O0X2WjpMluotAdOXgno6tbY4Pp7FgQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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