Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2f402d420d2a9c403bca63bedb44e20f6dd1908a5a5a94089767570d8a738e3' 
  AND token = 'yF/lGnJN8fgHOofhQ/vYQCeylM6nTpKAOnOWeip91TM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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