Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06c1fa38a734039be390c8bd9eee07c8f7067a673c940abf3c24457d561b547b' 
  AND token = '9SGc/BY2TjaEqRB6SDA3jhqBgxl4EN4I+a/LxFe0RVE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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