Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6052e95ee032b8a3a82b7d785a190ed699b1e63fc649ace83afc05b6ba20683e' 
  AND token = 'H8gP6+ynMqPpXTa3iATX6iPbG7tNyMX65Ophkrmco+8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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