Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88535570f63a8aa3737ceb354effffded052a95fb46a3b29694cf6d412ecc72a' 
  AND token = 'aY0qG9WXpfzsIY9Gzy3+JxTxDaWTew/VjiPFds3E+f4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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