Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '324e02e6a7a0bd5eb3353879075d85f0a30b282471cfaaa784dbdb335d6f078f' 
  AND token = 'dK0OeSUrTmQ4LclIQNnS4iMmEg+lgZj/wEwGt2fOSUw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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