Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7aeaf282adde1f085506278406725015d3bcd43f216a44a261aae17fbf953e7b' 
  AND token = '6oD7Dh49xS1EYUY8hCQ69lhZw7gczGHL14R6LetSXhE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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