SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2aca02d5bc7d4776b707e44fbca0199aaa065c144724d9f9a9f18d90347386f1' 
  AND token = 'L7CHqGA6feKmH+p1yGJ1bBZJ+h9t8vz/8dNQftyTSYw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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