Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce054a420b28fefa992cbd722789d221eb2dee1a94baea319fd1ca020734cde9' 
  AND token = 'iqwrIiBy4VAjLpTfPsbaaGEUfhDTwPbkmXsm12dc3jA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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