Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb7684961c7e6a784d6d0008eea2f178c3753cac9546685b751948c394a8612f' 
  AND token = 'x69mo+FnCSHGwj4Wbf7GI67JXLaxDeV6sfXjr89Rp7c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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