Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e83389263c569922ec6b516a67a93dfb7cef904ef86afa018427771c331f5a8' 
  AND token = '6x2WGoc3A27n8NlqTs9CLtoX1L4E9kc7k2I5qCGiP5E=' 
  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"
    }
  }
}