Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '719302dc2b6794a8bb28af93568bc521bbfe7293791cf791bde975f522c837e4' 
  AND token = 'QIUiMen7Q2qjJZPcetrPinNaZoyNhqVmCqoFDkE/tKU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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