Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26cf45c5959e9f51b0906c641edce7f55b4fbe4faf51871efb8bf7ce81d47446' 
  AND token = 'JoIRqQ8IUnWPhkt0DA6N9mvTP8xIk0/tQU9ANcorVKE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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