Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f60fbffb77f43835f948dfb6a700e2812db9d18b2b42eecb0c6fae25c753bb4' 
  AND token = 'OdA3V000nEvqbDPcjUE/8LZRsU33h0hOJrfzIxMWcWg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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