Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84d6440275d758761882a9813f7657738cd061784a1f9dc316a5d83ead958ae3' 
  AND token = 'uoslYvjeb68cur3cPwWiqG9uZbSaiqj5r5vlK7CYtpo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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