Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '832d32300d630b5cc510a9cdd0b021491c5ec945c63905cbfe6ff5edfad300ef' 
  AND token = 'WfWFp0k5pbuqJET7+zMP4StjkkUlBD5s/SKqiCRQmf8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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