Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97886b2a7cde1e0211ec8e9ab4a62ef520b7d95444db7f91ccc1da3a0efb24dc' 
  AND token = 'RZIgeMAM9KopCwX0gi1XZIdv1lnKSuJEyAZ1a3jmKLY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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