Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75ccd124f6b34c2c964064999c532d21e376c04003e5ff07a3e53169aca309ed' 
  AND token = 'IO463xsT1VnLZDN7zCmYdTyuvNEiCsakiOZth+iiO/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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