Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b6ed77fd85fe9dfb714b66221f48af17d0a1b23a30f2a2c7ae58d6db10f88681' 
  AND token = '4tu+7sBkHLozxrFU6XABvuHJAU8hz2+ePvXDGed2lVk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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