Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f465b6829885d44d52d291255f6ef48396108006d641ca9aae65a6f63d171d1c' 
  AND token = 'MIV0005cnTWis/LEo/+5FaOxv83x6RCajYoOft7TAqU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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