Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4d630b59505c37caa97d802517ab0f04f388e3019838cd2e4a07b46b51bdb7a' 
  AND token = 'mHXeOe3pxJl/cpwyrrnc7U+9vwgRSlaskv9ia9pn2Yg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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