Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12cc55fd45ce25a754d7289b8c6725a9ff38ea5db10ea437530136c9b88b7585' 
  AND token = '7389ZlaI4XqShQOOpdsMQdUuzf21mhij7ypG3tJX7sU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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