Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '891d207c6baf726c8a0a99bd32b84c140e920217d0d029f92802d0ebcd9321b6' 
  AND token = '7eCj2h7VPh3UN7RujEO/zupH2YJSsy91JkljB0OFFkY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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