Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02666cb659cf0f46d1c0fda4245a7e0989c28f07ae2aaf1357903a8dfe15d8c6' 
  AND token = 'TciuHAsSi8wYub9f4jHSg6NhT4kC3bmdcDZQkncnd50=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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