Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f1c392534433fb629517eacb8b5311d93f59540c146b599b87c9766e6194b3e' 
  AND token = 'reWRqeCRlbgMdnmPfam4UuxntEAZRxRN626S+oZYaPQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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