Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ef62b992b1e7548bb8808c33b877c0695f6b30e9af56877f9e167c12157c413' 
  AND token = 'SiC/vn1h7dSwYP08FlHXdIhNX0S1NOzdZXTzdDHPUR8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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