Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c7d050484020d612ff58ded1e473e43f0b22033b839f7528d42a3ad135ed2e7' 
  AND token = 'JXx2fX0RY1P98SrJF8sZzRCtdHFQV375t1IUKI5o23s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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