Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69d0e037ff15baf17511ac763cab3e149b8d45868ab389a7312a6fced4979187' 
  AND token = 'kQOlw2IlP+chjRo9haPfXlNSH4MeHoZwcHFojDPBgpI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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