Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b82af84fc520aebbb60fdb1af7be12fe59451a1c59c08764554acde31b5f53d0' 
  AND token = '0GrH4aJVJ7ooZ5bBI5DQ6cBUhJm7DCiK2hOonldQ7ac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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