Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6eaad3bd4b2778420041c378feb9bea89ccfa58d63a2ef99568c424a4e78ae01' 
  AND token = '2LpWueDQQhyCfcts/wCq5MDZV0tL4iYdmEXdIkq1P7s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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