Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afc8b9eaceb605bdaec925a9e926d3ee430b2ae6d0ec23f106057de24d9fd3fe' 
  AND token = 'x+m2RGEK6bw9Efj80ccLlLy/hDaL9E1W9dHGhnSNEYM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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