Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6aa5217b79abd7a51e37b76bf7b2886901d5d9a53eb35c15776da2b08c94ca0e' 
  AND token = 'HUwRwo4bXCDBw6LN7OWn0a5fp7cSlxP+qnZx861zBBM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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