Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3dc0ce84e1f778d6eb19bbc65de1383bd706ca57d63ce46f4b2485fda56e4766' 
  AND token = 'phtjVN8+B1XdCiWDlcWsHavS4K169Cr7NrcaIT7Gisk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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