Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f8a25aed28a92aa016f0e282837299c1a3333d91c86daaa990bc6f0aad819f3' 
  AND token = 'UhydW+Rm9OMnFa6EY7P+2vh919RhSj13HP9+dzluLhQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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