Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f572f4754265b08d0d96b340e8afd0e0511119a6a2facf7941cf6826850f733' 
  AND token = 'oWBdBrB7v1ZHtsMk+bJ0/ALcxjSIqpkkDMar7IUpWnU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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