Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c488a24961764300e7d7ecf51d7de54d85d2a13eb8cc2d351200525da52a4b63' 
  AND token = 'DEOodv+c4PMjwiOf3MkWwcf21/JgWxb+bv/TKapIrpA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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