Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f13a3037600e927e0673d8a726b338385098db3f177b13a369ea0ee50e852eb3' 
  AND token = 'q5xIvHM+2CGQzl5PoI/jfy4DUoeA8gegS7SThTnDXb4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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