Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9786471c0a721f4bfc5004585cc511a102f95aedfacb82cac0127bb6f1b46171' 
  AND token = 'WYW0uNaFYAOwr7FfOpyiG0y783QWpptdQXGok1QAzyQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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