SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc95250144604e828b3f238b8877ff1db8a8954cf1078fdbb33c464fbf5bea64' 
  AND token = '7dhLQjYV//5E7UFgKXG/OJVI4g+GqRuPO0x6PRcD9fE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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