Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0b9b873b810df58eee7483850a1ca43b615649b9ba2607e69ae2b298747bbb4' 
  AND token = 'ZOmtTZ7pYlkHXQdVBI7tjppPdJ8HfjbOLgoSDfatxf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}