Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98ee0c240dbb0400630bb2ac1cd806b6976eda205a0eb609f1be8af9629be6fc' 
  AND token = 'dgva7yQFmuEfdPoez7dRiMZGhHJDwO5ujuREivP1AhU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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