Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b429aa79cef0c4e9c718b92d09530cb209179bbe5be369774948258e76fd69ef' 
  AND token = 'gf6SBBi4Sl/79F7AxxIaGI/ZhVJ3lL1zwwba0ys8Nbk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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