Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '39b884018035c620e2ab9295798fec8b51f1b4e3b78a97b497b537f220b3faa4' 
  AND token = '7N2Akh7MIqNCMA9rOl4rY2p4Hl7HctumjiTppGtCKg8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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