Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6541faa111a454d9d80381f6dd06afb9eb5572627ae43052abb4ecbcfe6e2e7b' 
  AND token = 'QECGYZJGzk2p+OHZppUvfZADSJrn6SGR0duWFVf2pK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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