Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e281cc0f10c54f219224f7f5c2efe8ff6c5190ccd28908290cf3bdbc7ba1b68d' 
  AND token = '37/1XgFu5eqtOM+07nBlh0U6eIiziUippqxCxF0SRwo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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