Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '090ee6cb56d2bd0e8c59658fd14db7031775938ad6960d2b94bb402d84d060b4' 
  AND token = 'H3ylVJgo/QEnQSowvjZZm3chAHCznXkyKrZIQodcywQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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