Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2379f8462a4e71e442d9fcd85f045e38b2bf2f3bfd02eb1c711a976e33a48a84' 
  AND token = 'J3HS0zRISc4S5cDVcMcb8CzubNWheVMogz9PXYlGJwk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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