Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e14c6d7b54c7ee6d6cd8cec219276ff66a1e9e7bd61c1a261f0e433619d62e9' 
  AND token = 'BfcYzvLqiQV+qa4LZC9UaXcGNLmOz8TbYD5megXTBuE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}