Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1664b8de2ace4389e0a8769f33e4da003b96ff0eb58f11336585e91ef676b7e0' 
  AND token = '0CA0g+NSXAGCXj0UMckk3WkM8I4cm6dbPwZXmE1qmvw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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