Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6eca919640ab7d4b4cc5dc518f867e18ab727f45ced1a1dc6d08484f6650e18d' 
  AND token = 'Z38i3qiqBKYdNtPogI02NAFnf3TMcH4V6c4aHLfJzRA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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