Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '7688ef30b1bb9309ae22efabe8ce309284d3791de3adaff1bc02835db34dd35b' 
  AND token = 'h325eWMuzQs1HNHph4K3FfZ7hxgkyVISacWJW9uiGO8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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