Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92b6ec8c7f8f6e8e6e461cfe645f35b21e3a62c3be9f627bbf242826d1b05145' 
  AND token = '6MGCk8sbxvrZU4Em2P41ZX5YelOBZZzahjOrH3NF3BA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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