Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ab9cd72e56d4021faa02ccaed8181c221c9a953606276128c8b1b774eb841bbf' 
  AND token = 'lqnoJuiXHfRAN78C99OrlqCdYKhtPZiYRG5QA49vvbA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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