Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aefc1292af8a5c6f6efad01d978d92ba768b420c367093070c120c5b98c26c74' 
  AND token = '8IcFm3Pm7w22H/WoXMef1UeXZOuJ83Upq9Sjuih4B/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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