Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de3b404796e6406d46bbf02cf2516dc8df2ce07fab9979d77a81c03298d8d4a9' 
  AND token = 'bQlN7faXEUd54GF41sFEiUTKd/zI9suqu65kUefKCOw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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